Looking for a bl manhwa again

So it was set in a zombie apocalypse and the use meet a seme who saves him from the zombies and fights for him, then he meets another guy and during that tough time, they are both fighting over the uke. I don't remember properly but I think it ends up in a poly and during the apocalypse, they are having sex non-stop with no regards to time and place and then they form a group as the story progresses and that group of people move together to save themselves. The uke and the two semes are the part of it as well